1. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station 1221 South Main Street, Moscow, ID 83843 USA
2. State Key Laboratory of Tree Genetics and Breeding Research Institute of Forestry, Chinese Academy of Forestry Beijing 100091 China
3. Instituto Forestal Sede BioBio, Concepción Chile
4. Instituto Ciencias Agroalimentarias Animales y Ambientales (ICA3), Universidad de O'Higgins San Fernando Chile
5. Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry University 35 Qinghua Donglu, Haidian District, Beijing 100083 China